The pedestrian walked 160 m in the first 2 minutes, 180 m in the next 2 minutes

The pedestrian walked 160 m in the first 2 minutes, 180 m in the next 2 minutes, and 200 m in another 2 minutes. What was the average speed of the pedestrian?

Average pedestrian speed:
Vav. = S / t, where S is the total distance traveled (S = S1 + S2 + S3, where S1 = 160 m, S2 = 180 m, S3 = 200 m), t is the total travel time (t = t1 + t2 + t3 , where t1 = 2 min = 120 s, t2 = 2 min = 120 s, t3 = 2 min = 120 s).
Let’s calculate the average speed of a pedestrian:
Vav. = S / t = (S1 + S2 + S3) / (t1 + t2 + t3) = (160 + 200 + 200) / (120 + 120 + 120) = 560/360 = 1.56 m / s.
Answer: The average speed of a pedestrian is 1.56 m / s.